id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2668	client_body_buffer_size - Body Larger Than Buffer Size Is Omitted	shalhevetm@…		"I set client_body_buffer_size to 4MB and client_max_body_size to 150MB.
When I send a request with a 6 MB body (6MB sized argument), in access_by_lua_block, the body appears as empty.

    access_by_lua_block {

        ngx.req.read_body()
        local body_data = ngx.req.get_body_data()

        if body_data then
            ngx.log(ngx.ERR, ""Request body: "", body_data)
        else
            ngx.log(ngx.ERR, ""No request body found"")
        end
     }

I see the log ""No request body found"", even though the body was clearly not empty.

client_body_in_single_buffer is default (wasn't set).

When I increased client_body_buffer_size to 10MB, I had no issues with the 6MB body.

Why is that so? Why does the buffer size cause the body to appear as empty?"	defect	new	major		other	1.21.x		client_body_buffer_size		Linux podname 5.15.133+ #1 SMP Sat Dec 30 13:01:38 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux	openresty/1.21.4.3